Secondly, it researches the selection principle and process of TPLs, and builds an evaluating index system on the basis of analysis of the factors that affect the selection of TPLs.
然后研究了第三方物流供应商的选择原则及步骤,并在分析影响第三方物流供应商选择的因素的基础上,提炼出了25个评价指标,建立了较为科学、全面的指标体系。
参考来源 - 第三方物流供应商的评价与选择研究·2,447,543篇论文数据，部分数据来源于NoteExpress
It pointed selection principle of stepping motor, and divisions of starting and running frequency range.
指出了步进电机的选择原则、动和运行频率区段的划分。
The third part discusses the selection principle of wear-corrosion resistant materials as a referent of grinding ore media.
第三部分，以湿磨的磨矿介质为产品对象，讨论了耐磨蚀材料的选择原则。
The gear pump seals the selection principle is not high demand, for the occasion, but by experience, not to replace timely selection.
齿轮泵密封垫的选用原则是，对于要求不高的场合，可凭经验选取，不合适时再更换。
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